[FreeGeoCZ] Fwd: [GRASS-dev] [bug #5396] (grass) hermannskogel datum parameters for Slovakia

["Martin Landa" <landa.martin AT gmail.com>]

Zdravim, preposilam GRASS bug ticket, aktualni stav v GRASS-CVS:

hermannskogel "towgs84=570.8,85.7,462.8,4.998,1.587,5.261,3.56" "Czech
Republic" " "
hermannskogel "towgs84=559.0,68.7,451.5,7.920,4.073,4.251,5.71" "Slovakia" " "

Porovnam-li s parametry z GRASSwikiCZ -- nejsem si jisty, jake hodnoty
parametru pro SR pouzit...

Pro SR:

name: Krovak
datumparams: towgs84=558.7,68.8,452.2,8.025,4.105,4.295,5.74
proj: krovak
ellps: bessel

?

Martin

---------- Forwarded message ----------
From: Request Tracker <grass-bugs AT intevation.de>
Date: 18.12.2006 13:40
Subject: [GRASS-dev] [bug #5396] (grass) hermannskogel datum
parameters for Slovakia
To: grass-dev AT grass.itc.it


this bug's URL: http://intevation.de/rt/webrt?serial_num=5396
-------------------------------------------------------------------------

Subject: hermannskogel  datum parameters for Slovakia

Platform: GNU/Linux/x86
grass obtained from: Trento Italy site
grass binary for platform: Compiled from Sources

Hermannskogel datum parameters for Slovakia (Krovak projection) are
wrong. The estimated error for these parameters is about 120-130 m.
Unless proper parameters are available I suggest to use parameters for
Czech republic which give acceptable results with 1-3 meter error.
The item for Slovakia should be removed from menu and item for Czech
republic (1.) could be extended to include also Slovakia.
The evaluation was done using local cartographic tools (Samuel for
ArcView and Dattra).


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--
Martin Landa <landa.martin AT gmail.com> * http://gama.fsv.cvut.cz/~landa *